Lighting device



' Dec; 1s,- 1945.

Rgc. MA'URETTE LIGHTING DEVICE Filled March 2,9, 1943 l 3 Sheets-Sheet 1REN a MAH/P5775 n'l/en for i ywm/ Dec. 18,'1915.

f R. G. MALJRETTE A Filed March', 1943 LIGHTING DEVICE y n l` 3Sheets-Sefet 2 [11 :fen-fo j', I

REN ci ,IMU/IRENE lPatented Dec. 18, 1945 LIGHTING DEVICE Ren G.Maurette, Beverly, Mass., assignor to SylvaniaElectric Products Inc.,Salem, Mass., a corporation of Massachusetts Application March 29, 1943,Serial No. 481,039

2 Claims. .(Cl. 24U-11.4)

v This invention relates to lighting devices, and has particularreference to luminescent lighting devices.

An object of this invention is to provide an improved luminescentlighting structure.

Another object is to provide an effectively portable luminescentlighting structure.

Another object is to provide a fluorescent lighting unit which may bemoved about in a variety of positions and locations without interruptingits illuminating action. Further objects, advantages and features willbe apparent from the following specification taken in conjunction withthe accompanying drawings, in which:

. Figure 1 is an isometric rear view of an illustrative embodiment ofthis invention;

Figure 2 is a side elevation of the structure of Figure 1;

Figure 3 is a schematic'wiring diagram of the electricalvsystem used inthe structure of Figure Figure 4 is an exploded isometric front view ofthe structure of Figure 1;

- Figure 5 is a view of ther assembly of thesupporting hook of Figures1, 2 and 4;

Figure 6 is a section through the starter button assembly of thestructure of Figure 1;

Figure 7 is an illustration of the end of the connection cord for thestructure of Figure 1. showing the arrangement of the ground connection;and V Figure 8 is an exploded view similar to Figure 4, in illustrationof an alternate structure,

The illustrative embodiment of this invention As in Figure 1, theillustrative embodiment of this invention comprises a fluorescent lampunit I, a flexible electrical connection cord 2, and a ballast unit 3,mounted on the cord 2 in series Vconnectionwith one of the wirestherein. The

unit I is provided with a hook 4 for hanging the unit on a support, andthe cord 2 has an end plug 5 and a branch lead 6 as a ground connecasdisclosed in the drawings shows a fluorescent lamp which may be movedabout to various positions and locations, within the limits of the cordlength. This structure is particularly useful to a workman moving about,or whenit is desired to illuminate hard to get at or confined 'areas orobjects. IIt may, however, be used as a stationary fixture, if desired.

A 6 watt lamp in this structure provides a convenient portable lightingdevice. In referring to portability it is intended to express that thedevice is effectively portable, That is to say, it is portable withinthe limits imposed by its flexible electric connection cord. Thereferences to the positionof ythe device are intended as specifying itsarrangement, that is, whether the lamp is vertical, horizontal or facingup or down.

The `references to location are intended to be indicative of bodilymovement of the device from one spot to another,

tion (Figure 7) for the body of the unit I. The ground plug vl may bethreaded in as a permanent fixture, and the branch 4lead 6 is providedwith a contact sleeve 8 for receiving the head of the plug 1.

The circuit diagram of this device is shown inFigure 3, in which thelamp envelope!! is provided with a pair of filamentary electrodes I (Iand Il, having leads I2 and I3 and I4 and I5 respectively. Lead I4includes ballast 31, lead I2 includes a snap action primary starter lampswitch I 8, and leads I3 and I5 jointly include a spring buttonsecondary starter lamp switch I1, as at |11 in Figure 6. The groundlead. 61 in Figure 3 is illustrative of the lead 6 of Figure '7.

In assembly, the lamp unit, shown as exploded in Figure 4 comprises abox-like base I8 which hasa longitudinal slot I9 in its top, and whichsupports an assembly of an upwardly facing trough-like reector 20 andlamp sockets 2|,

The reflector 20 is joined with the sockets 2|v by means of bolts 22threaded in openings 23'in the mounting platforms 24 of the sockets ZI.The sockets 2l rhave their lower portions within the base I8 so that theshoulders 25 engage the under side of the top of the base I8, adjacentthe slot I9,. The platforms24 lie Within the slot I9, and the reector 20rests on the top of the base The lamp 26 has base pins 21 Awhich areengaged for support and electrical connection, in the openings 28 of thesockets 2|, grill 29 is mounted over the lamp 26 and sockets 2I and onthe reflector 20 with its body slightly sprung to move its side ledges30 toward each other, The edges 30 are thus contained in the trough ofthe reflector 20 and held against lateral movement by the reilector sidewalls 3I.

An -arched or movement which would remove thev grill edges 30 from thetrough of the reflector 20.

The hook 4 is pivotally mounted in one of the end caps 32, as in Figure5. The cord 2,/ and leads I2, I3, I4, and I5' are shown in Figure 4 5 toillustrate their general location in the 4assem bly.

The primary starter snap switch I61 is mounted on the base I8 as shownin Figures 1 and 4 and corresponds to the switch I6 of Figure 3.

The spring button secondary starter switch I11 is also mounted on thebase I8, as in Figures l and 6. This switch assembly comprises a housingformed by a pair of telescoping members 35 and 36 mounted through acircular opening 31 in l5 the body I8 and clamping the edgespf .theopening 31 between an annular edge.overhang 38 of the member 35 and theannular end 39 of the member 36. d,

The member "es is substantiany tubumr alla `2t contains a button 40urged by spring 4I against.,

a shoulder 42 The electrical leads I4 and I5 are connected to contacts43 and 44 respectively and pressure on the' button 40 bridges contacts43 and 44 with a contact 45 to close the switch. 25

The lamp may be put inbperation, see Figure 3, by closing the snapswitch I6 and the/'spring button switch I1, i thus completing a circuitthrough the filaments Ill and \I'I. The filaments are heated in thismanner preparatory 'tosup-fy porting an arc through the envelope 9, and,after a time period of the order of=,a few seconds, the spring button isreleased, switch I1 opens, and an arc is struck through the envelope 9across the filaments I and II/to produce'the usual fluo-y rescent lampillumination.

The alternate assembly of Figure 8 comprises a base 46, a base `cover 41on Which lamp sockets 48 are mounted, a lamp 49 to be mounted in sock--ets 48, and an overallcover and shield 50 comprising endcaps I and grill52.

The base 46 is in the form of a flat strip with laterally overandinturned side edges as at 53, terminating in upwardly extendingI'flanges 54. Upwardly extending end tongues 55y are also formed on thebase 46 with one, as at 56, vertically slotted to receive a lead cordextending from a power source to the sockets 48. The tongues 55 areresilient, and, in assembly, extend upward within the endcaps 5I of thecover 50 in end-wise outward gripping engagementthere.- with.

The base cover 41 is formed as an open-ended,

downwardly'facing channel with a top 51 and sides 58. The sides 58 tover the side flanges 54 so as to bring the sides of the endcaps 5I intosubstantially ush relation with the sides of the base 46. The lateralseparation of the sides "58 is such, with respect to thelateralseparation of the side flanges 54 of the base 46, that a lateral80 a:support; comprising a substantially fiat 'gripping action existstherebetween when assembled, either from'a force fitting or resilientgripping action, so that the base 46 and base cover 41 may thus be heldtogether in subassembly.

Switches 59 and GIJ'are ordinary snap switches mounted in one of theside walls 58 of the base cover 41, and correspond to switches I6 and I1fof Figure 3.

The top 51 of the base cover 41 is provided with openings through .whichsockets 48 extend in their assembly with the cover 41. The sockets havelower, forwardly extendingy shelf' portions as at 6I which extendbeneath the top 51 and are secured thereto. The shelf 6I corresponds tothe shelves 24 of Figure 4 and may be formed in duplication thereof ifdesired.

The cover is an integral unit with the end caps 5I secured to and joinedby the grill 52. One endcap has inwardly extending tongues as at 62 forengagement with the underside 'of the from each end of said base cover;a grill extendl ing in'an arch over said lampholders from onelongitudinal edge of the top portion of said chan-r nel-like base covertoxthe other; end caps at each end of said base cover to enclose theends of said grill and base cover and having tongues to engage saidbaseplatephook-like means for temporarily securingthe lamp device inoperating position` and a flexible cable for conduction power to thelamp.

2. A portable fluorescent lamp device having a flexible cable to supplypower to the lamp and means for temporary attachment of the lamp to aseplatefa channel-shaped base cover member disposed with its open facetoward said -base plate, flanges struck up from said base plate engagingthe free` longitudinal edges of said base cover member to form a hollowenclosure, a pair of lamp holders projecting through the' top of saidenclosure to hold a lamp, a perforated metallic arch shaped protectivegrill extending over said lamp holders, a pair of end caps embracing theends of said grille and extending over and forming end closures for saidenclosure and means for securing said bottom plate to said end caps tounite the complete device.

REN G. MAURE'ITE.

